#include <iostream>

using namespace std;
int main()
{
    bool y;
    int a,b,c,x=0;
    cout<<"a=";
    cin>>a;
    cout<<"b=";
    cin>>b;
    cout<<"c=";
    cin>>c;
    if (a>=0) x++;
    if (b>=0) x++;
    if (c>=0) x++;

    if (x==2) y=true;
    else y=false;
    if (y==1) cout<<"verno";
    else cout<<"neverno";

   return 0;
}
